.hide {
    display: none;
}

#shadow {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: beige;
    opacity: 0.4;
    z-index: 100;
}

#add_cls_model {
    position: fixed;
    top:200px;
    left:200px;
    height:300px;
    width:400px;
    z-index:200;
    background-color: azure;
}

#edit_cls_model {
    position: fixed;
    top:200px;
    left:200px;
    height:300px;
    width:400px;
    z-index:200;
    background-color: azure;
}


.alarm_class {
    color: red;
    border-width: medium;
    background-color: aqua;
}